Define overpowered.
The first 3E campaign I played in, the DM didn't know the rules and we were stupid broken, to the point it was just not fun. He thought str + 6 gloves added +6 to your BONUS. He allowed one player to start the game with a ring of 3 wishes. His wishes ended up giving him wings and somehow a half-celestial, half-dragon troll (without the template LAs, of course) Pale Master that was basically unkillable. Oh, and he used a wish to get millions of gp without any repurcussions, too. Long story short, by level 22 or so, another PC had created transmute lead to platinum (and the reverse) and had completely destroyed the economy. Meanwhile, the gods as a whole became alarmed at our troll PC (who had since become an Abomination monster of legend or somesuch, again because the DM allowed him to). I had left the game by then, but apprently the entire pantheon couldn't defeat the party and the DM just declared everything got sucked into a black hole and quit D&D for several years. Ah, bad times.